gdb/

	* dwarf2loc.c (read_pieced_value): Handle get_frame_register_bytes
	returning that the register piece is unavailable/optimized out.
	(write_pieced_value): Handle get_frame_register_bytes returning
	that the register piece is unavailable/optimized out when doing a
	read-modify write of a bitfield.
	* findvar.c (value_from_register): Handle get_frame_register_bytes
	returning that the register piece is unavailable/optimized out.
	* frame.c (get_frame_register_bytes): New parameters `optimizedp'
	and `unavailablep'.  Throw error on bad debug info.  Use
	frame_register instead of frame_register_read, to fill in the new
	arguments.
	* frame.h (get_frame_register_bytes): New parameters `optimizedp'
	and `unavailablep'.
	* valops.c: (value_assign): Adjust, and handle
	get_frame_register_bytes failing.
	* spu-tdep.c: Include exceptions.h.
	(spu_software_single_step): Adjust, and handle
	get_frame_register_bytes failing.
	(spu_get_longjmp_target): Ditto.
	* gdbarch.sh (register_to_value): Change to return int.  New
	parameters `optimizedp' and `unavailablep'.
	* gdbarch.h, gdbarch.c: Regenerate.
	* i386-tdep.c (i386_register_to_value): Adjust to new
	gdbarch_register_to_value interface.
	* i387-tdep.c (i387_register_to_value): Ditto.
	* i387-tdep.h (i387_register_to_value): Ditto.
	* alpha-tdep.c (alpha_register_to_value): Ditto.
	* ia64-tdep.c (ia64_register_to_value): Ditto.
	* m68k-tdep.c (m68k_register_to_value): Ditto.
	* mips-tdep.c (mips_register_to_value): Ditto.
	* rs6000-tdep.c (rs6000_register_to_value): Ditto.

1 files changed, 10 insertions, 3 deletions

diff --git a/gdb/rs6000-tdep.c b/gdb/rs6000-tdep.c
index b8c87fb8b82..23fe9e336fe 100644
--- a/gdb/rs6000-tdep.c
+++ b/gdb/rs6000-tdep.c
@@ -2504,20 +2504,27 @@ rs6000_convert_register_p (struct gdbarch *gdbarch, int regnum,
 	     != TYPE_LENGTH (builtin_type (gdbarch)->builtin_double));
 }
 
-static void
+static int
 rs6000_register_to_value (struct frame_info *frame,
                           int regnum,
                           struct type *type,
-                          gdb_byte *to)
+                          gdb_byte *to,
+			  int *optimizedp, int *unavailablep)
 {
   struct gdbarch *gdbarch = get_frame_arch (frame);
   gdb_byte from[MAX_REGISTER_SIZE];
   
   gdb_assert (TYPE_CODE (type) == TYPE_CODE_FLT);
 
-  get_frame_register (frame, regnum, from);
+  if (!get_frame_register_bytes (frame, regnum, 0,
+				 register_size (gdbarch, regnum),
+				 from, optimizedp, unavailablep))
+    return 0;
+
   convert_typed_floating (from, builtin_type (gdbarch)->builtin_double,
 			  to, type);
+  *optimizedp = *unavailablep = 0;
+  return 1;
 }
 
 static void